code: def testSerializeDeserialize(self):
      sparsity = pruning_schedule.PolynomialDecay(
          0.2, 0.6, 10, 20, 5, 10
      )
  
      config = sparsity.get_config()
      sparsity_deserialized = quantize_utils.deserialize_keras_object(
          config,
          custom_objects={
              "ConstantSparsity": pruning_schedule.ConstantSparsity,
              "PolynomialDecay": pruning_schedule.PolynomialDecay,
          },
      )
  
      self.assertEqual(
          sparsity.__dict__, sparsity_deserialized.__dict__
      )
  
imports: from absl.testing import parameterized
  import tensorflow
  from tensorflow_model_optimization.python.core.keras import compat
  from tensorflow_model_optimization.python.core.quantization.keras import utils
  from tensorflow_model_optimization.python.core.sparsity.keras import pruning_schedule
label_desc: Use image node_id 3 for calling the PolynomialDecayTest obj's underlying member method code with example usage: obj.testSerializeDeserialize() without return types